CVE-2025-54136

Description

Cursor is a code editor built for programming with AI. In versions 1.2.4 and below, attackers can achieve remote and persistent code execution by modifying an already trusted MCP configuration file inside a shared GitHub repository or editing the file locally on the target's machine. Once a collaborator accepts a harmless MCP, the attacker can silently swap it for a malicious command (e.g., calc.exe) without triggering any warning or re-prompt. If an attacker has write permissions on a user's active branches of a source repository that contains existing MCP servers the user has previously approved, or allows an attacker has arbitrary file-write locally, the attacker can achieve arbitrary code execution. This is fixed in version 1.3.

Reserved 2025-07-16 | Published 2025-08-01 | Updated 2025-08-04 | Assigner GitHub_M

Problem types

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

< 1.3
affected

References

github.com/...cursor/security/advisories/GHSA-24mc-g4xr-4395

cve.org (CVE-2025-54136)

nvd.nist.gov (CVE-2025-54136)

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